diff --git a/README.md b/README.md
index 9b7769e..99dc0bf 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # Minchat for YunoHost
 
 [![Integration level](https://dash.yunohost.org/integration/minchat.svg)](https://dash.yunohost.org/appci/app/minchat) ![](https://ci-apps.yunohost.org/ci/badges/minchat.status.svg) ![](https://ci-apps.yunohost.org/ci/badges/minchat.maintain.svg)  
-[![Install Minchat with YunoHost](https://install-app.yunohost.org/install-with-yunohost.png)](https://install-app.yunohost.org/?app=minchat)
+[![Install Minchat with YunoHost](https://install-app.yunohost.org/install-with-yunohost.svg)](https://install-app.yunohost.org/?app=minchat)
 
 *[Lire ce readme en français.](./README_fr.md)*
 
diff --git a/check_process b/check_process
index 3de3894..8fcde4f 100644
--- a/check_process
+++ b/check_process
@@ -14,5 +14,4 @@
 		upgrade=1
 		backup_restore=1
 		multi_instance=1
-		incorrect_path=1
 		port_already_use=0
diff --git a/manifest.json b/manifest.json
index 9f26658..de6cf9f 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,48 +6,36 @@
         "en": "Minimalist web chat",
         "fr": "Web chat minimaliste"
     },
-    "version": "1.0~ynh2",
+    "version": "1.0~ynh3",
     "url": "https://github.com/wojtek77/chat",
     "license": "MIT",
     "maintainer": {
         "name": "chtixof"
     },
      "requirements": {
-        "yunohost": ">> 3.8.1"
+        "yunohost": ">> 4.1.7"
     },
     "multi_instance": true,
     "services": [
         "nginx",
-        "php7.0-fpm"
+        "php7.3-fpm"
     ],
     "arguments": {
         "install" : [
             {
                 "name": "domain",
                 "type": "domain",
-                "ask": {
-                    "en": "Choose a domain for Minchat",
-                    "fr": "Choisissez un domaine pour Minchat"
-                },
                 "example": "domain.org"
             },
             {
                 "name": "path",
                 "type": "path",
-                "ask": {
-                    "en": "Choose a path for Minchat",
-                    "fr": "Choisissez un chemin pour Minchat"
-                },
                 "example": "/minchat",
                 "default": "/minchat"
             },
             {
                 "name": "is_public",
                 "type": "boolean",
-                "ask": {
-                    "en": "Is it a public site?",
-                    "fr": "Est-ce un site public ?"
-                },
                 "default": true
             }
         ]
diff --git a/scripts/install b/scripts/install
index 4bc5e8b..4dfd6e4 100644
--- a/scripts/install
+++ b/scripts/install
@@ -47,7 +47,6 @@ ynh_script_progression --message="Storing installation settings..." --weight=1
 
 ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=path --value=$path_url
-ynh_app_setting_set --app=$app --key=is_public --value=$is_public
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
@@ -79,7 +78,7 @@ ynh_system_user_create --username=$app
 #=================================================
 ynh_script_progression --message="Configuring PHP-FPM..." --weight=1
 
-ynh_add_fpm_config --phpversion=$YNH_PHP_VERSION
+ynh_add_fpm_config
 phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
 
 #=================================================
@@ -94,12 +93,12 @@ chown -R $app: $final_path
 #=================================================
 # SETUP SSOWAT
 #=================================================
-ynh_script_progression --message="Configuring SSOwat..." --weight=3
+ynh_script_progression --message="Configuring permissions..." --weight=3
 
 # Make app public if necessary or protect it
 if [ $is_public -eq 1 ]
 then
-	ynh_permission_update --permission "main" --add "visitors"
+	ynh_permission_update --permission="main" --add="visitors"
 fi
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 9ccd45b..35285bd 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -18,7 +18,6 @@ app=$YNH_APP_INSTANCE_NAME
 
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
-is_public=$(ynh_app_setting_get --app=$app --key=is_public)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 
 #=================================================
@@ -32,21 +31,19 @@ upgrade_type=$(ynh_check_app_version_changed)
 #=================================================
 ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
 
-# Fix is_public as a boolean value
-if [ "$is_public" = "Yes" ]; then
-	ynh_app_setting_set --app=$app --key=is_public --value=1
-	is_public=1
-elif [ "$is_public" = "No" ]; then
-	ynh_app_setting_set --app=$app --key=is_public --value=0
-	is_public=0
-fi
-
 # If final_path doesn't exist, create it
 if [ -z "$final_path" ]; then
 	final_path=/var/www/$app
 	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 fi
 
+# Cleaning legacy permissions
+if ynh_legacy_permissions_exists; then
+	ynh_legacy_permissions_delete_all
+
+	ynh_app_setting_delete --app=$app --key=is_public
+fi
+
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================